The Wilbur A. Sawyer Papers

In 1934, Dr. Sawyer made another trip to Brazil to inspect yellow fever control activities, including an investigation of
a puzzling outbreak of the disease in a rural region. The Yellow Fever Service was run collaboratively by the Rockefeller
Foundation and the Brazilian government. Local public health officials were key personnel in this program.

NOTE: The left half of the original photograph is washed out, and lighter than the right half.